| Millbrook to Orbetello | 5,093.13 mi (8,196.61 km) |
| Millbrook to Oria | 5,446.49 mi (8,765.28 km) |
| Millbrook to Oristano | 5,058.91 mi (8,141.52 km) |
| Millbrook to Orta Nova | 5,331.06 mi (8,579.51 km) |
| Millbrook to Orte | 5,144.36 mi (8,279.04 km) |
| Millbrook to Ortona | 5,236.60 mi (8,427.49 km) |
| Millbrook to Orvieto | 5,123.29 mi (8,245.15 km) |
| Millbrook to Orzinuovi | 4,939.16 mi (7,948.82 km) |
| Millbrook to Osimo | 5,156.60 mi (8,298.74 km) |
| Millbrook to Ospitaletto | 4,940.14 mi (7,950.39 km) |
| Millbrook to Ostuni | 5,435.42 mi (8,747.47 km) |
| Millbrook to Ottaviano | 5,294.11 mi (8,520.04 km) |
| Millbrook to Ovada | 4,907.82 mi (7,898.37 km) |
| Millbrook to Ozieri | 5,055.45 mi (8,135.95 km) |
| Millbrook to Paceco | 5,309.49 mi (8,544.79 km) |
